21186945

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{36217}}^1$

素因数の和:36241

約数の個数: 24

約数和(自身を含む): 39550056

約数和(自身を除く): 18363111

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 195, 585, 36217, 108651, 181085, 325953, 470821, 543255, 1412463, 1629765, 2354105, 4237389, 7062315, 21186945]

約数ペア:

[(1, 21186945), (3, 7062315), (5, 4237389), (9, 2354105), (13, 1629765), (15, 1412463), (39, 543255), (45, 470821), (65, 325953), (117, 181085), (195, 108651), (585, 36217)]